diff --git a/build.gradle b/build.gradle
index c473286d719..87ad6abb1c8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,7 +38,7 @@ ext {
 	kotlinVersion        = "1.2.71"
 	log4jVersion         = "2.11.2"
 	nettyVersion         = "4.1.44.Final"
-	reactorVersion       = "Californium-SR14"
+	reactorVersion       = "Californium-SR15"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
 	rxjava2Version       = "2.2.17"